Signors of one-third to emil blumenhein



3 Sheets-Sheet 1.

(No Model.) I

' P. 81; J. A. MEYER.

' v ELECTRIC LOCK.

' Paten ted Dec. 17, 1895.

vilwemo MW fiaaw'tyaz U Ma $19,

AN BREW B GRAHAM. PnmoumuwAsmnm-omn c (No Model.) '3 sheets sheet 2.

P. & J. A. MEYER. ELECTRIC LOCK.

No. 551,682. Patented Dec. 17, 1895..

wm m gum/bow; QMM MV @wzaw w J m I Wm AN DREW RURAHAM.PHUTOUTHQWASHINGTON. 0.0,

(No Model.) 3 SheetsSheet 3.

P. & J. A. MEYER.

ELEGTRIG LOOK.

No. 551,682. Patentd' Dec. 17, 1895.

m Wm

AYM W- AN BREW BGRAHAM. PNOTO-U'I'HDVWASHINGTDN B.C.

NrTED STAT S PHILIP MEYER AND JULIUS A. MEYER, OF NEWARK, NEW JERSEY,AS-

SIGNORS OF ONE-THIRD TO EMIL BLUMENI-IEIN, OF SAME PLACE.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 551,682, dated December17, 1895.

Application filed February 23, 1895. Serial No. 539,365. (No model.)

T0 at whom itvmay concern; 7

Be it known that we, PHILIP MEYER and JULIUS A. MEYER, citizens of theUnited States, residing at Newark, in the county of Essex and State ofNew Jersey, have invented certain new and useful Improvements inElectric Locks; and We do hereby declare the 'following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersand numerals of reference marked thereon, which form a part of thisspecification.

The objects of this invention are to reduce the costof construction, torender the working parts more easy of operation and to thus avoidjarring and undue pressure upon the door in closing the same, to providea bolthead that is operable-independent of the keylatch and knob-latch,so that the said latches may be operated by either the keyor knobwithout affecting the electric appliances, the operation of either beingaccomplished without affecting the other and thus reducing the amount offriction which would otherwise be required, to provide a bolt-head thatcan be influenced more easily by a low electrical force, and to secureother advantages and results, some of which will be referred tohereinafter in connection with the description of the working parts.

The invention consists in the improved electrical lock adapted to beoperated to unlock the doors by electricity, and in the arrangements andcombinations of parts, all sub stantially as will be hereinafter setforth, and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, embraced in three sheets,'inwhich like letters and numerals of reference indicate correspondingparts in each of the several views, Figure 1 is a sectional view of aportion of a door and casing to which our improved lock andstriker-plate are secured in any suitable manner, the variety of lockshown being what is known as a mortise-lock, although the invention maybe applied to a rim-lockwithout avoiding the invention, one of the sideplates of the lock being removed to show more clearly the interiorconstruction and operation of the parts. Fig. 2 is a similar viewshowing the operation of the parts that are controlled by the electricalcircuit more clearly. Fig. 3 is a detail showing the relation of thekey-bolt to the latch. Fig. 4: is a section taken at line as, Fig. 1. IFig. 5 is a detail plan showing the keyhole in one of the side plates ofthe lock, the side -walls of said hole being of peculiar construction.Fig. 6 is a section showing more clearly the said hole and its relationto the escutcheon-plate and the door.

In said drawings, a indicates a suitable casing whichmay be made in anymanner common in look work.

b indicates the knob-latch, and c the keylatch.

d indicates the bolt-l1ead which in the present construction is operableindependently by the said knob-latch and key-latch and electricaldevices. The said bolt-head is of peculiar constr uction and is easy ofoperation, so thatiacomparatively small electromotive force will besufficient to move the same. The

provided with ears e e, perforated to receive a pivot f, which latterhas its bearings in lugs g g, cast on the inner side of the lock-plate.The'said bolt-head extends through an aperture in the lock-case andprojects from the outer face of the face-plate a of the case so as toengage the striker-plate h of the casing. Where it projects the saidbolt-head is provided with an inclined surface '5 to engage saidstriker-plate and enable the said bolthead to be easily repressed intothe lock-case as the door is-closed in the manner common in latch-bolts.

Integral with one of the ears of the bolt-head is formed an army, whichextends into engagement with projections and Zof the knob latch 11 andkey-latch 0, so that when either of the said latches is drawn back bythe key or knob the said bolt-head will be turned on its pivot and drawnback into the lockcase to admit the opening of the door. The saidbolt-head is also linked to the armature-lever n, stationed adjacent tosaid bolt-head within the lock-case, the link at being pivoted to thesaid bolt-head at 0, Fig. 4:, and to the armature-lever m at 19. Saidarmature-lever is fulcrumed at p to a suitable bearing formed saidbolthead cl consists of a casting which isin the ease and is held normallyaway from the magnet, so that the bolt-head is kept at itsontwardly-projeeting position by a spring q. The armature'lever m isoperated by the magnet 0', which is also stationed within the lock-case,the parts being so disposed as that should the electrical. appliancesbecome disarranged or inoperative for any reason it will not render thelook as a whole inoperative; but the key and kn ob-latehes will beoperable and effective and eliicient in service independent of saidelectrical appliances.

The magnets are connected through ei rcuitwires 3 with a battery (notshown) in any suitable manner. The knob-latch Z) is operated through alever 15 and follower a by a knobspindle '1, the said follower a andspindle 1* being of any usual construction. To look the knob-spindle sothat it cannot be turned from the outside or inside of the door, weemploy a thumb-catch ugwhieh is fulcrumed within the lock-case at E2.Said catch is provided with locking-jaws 3 3, which engage oppositesides of one of the projections t of the follower. It is also providedwith a knob or button 5, Fig. i, which projects through a small slot (3in the lock-case to the inside of the door, where it may be operated bythe fingers to prevent the knob from being turned. The thumb-catch "w isheld in either its locked or unlocked positions by a spring 1b, which isbent as indicated in Figs. 1 and 2, so as to form an angle 1st, whichbears on the crest 1&0 of an oppositely inclined portion of the catchlying closely adjacent to the pivot 2 thereof, so that, by turning thecatch in one direction or the other, the spring will bear on one of theinclines or the other and thus hold the said catch in either of thedesired positions. The knob-latch b and its lever i are held in theirpositions admitting the normal projection of the bolt-head by a spring15, which maybe of any suitable construction and arrangement.

In operating the device, the bolt-head is repressed so as to admittheopening of the door either by the knob-latch 1), operating in connectionwith the lever 1 follower u, and knobspindle "v, the longitudinalmovement of the latch causing the projection k thereof to press back onthe arm j and turn the bolt-head pivotally, or by the key-latch c,repressed by a key in any ordinary manner, the projection Z in thisevent pressing in a similar manner on the arm j. \Vhen the lock is to beopened from a distance-say from the third story of a house-and is to beoperated by means of; the electrical connections, when the circuit isclosed and the magnet r is magnetized, they draw the armature or, sothat the link it, attached to said armature, causes the bolt-head toturn on its pivot, as before, in connection with the key and knoblatches; but, because of the independence of the bolt-head from the saidlatches, the operation of repression is very easy, requiring but verylimited power on the part of the magnet.

To facilitate the operation of repressing the bolt-head and to avoid thefriction that would tend to require increased motive force,we haveprovided the lock striker 71 with a roller, (shown in Fig. 4, at 16,)which engages the segmental portion 17 of the bolt, the roller revolvingon its pivot as the bolthead is repressed or drawn back, as will beundersl ood.

The knob-latch b is also provided with a projection 7, which is operatedby a follower 8, which in turn is operated by a finger-piece 9,projecting from the inside of the door, onabling the door to be openedfrom the inside when the knob has been locked by the catch 11'.

The key-latch 0 may be of an y ordinary construction. \Ve have shown itprovided with tumblers 10, springs 11 governing the operation of saidtumblers, and a spring 12, adapted to hold the said latch so that theprojections e: will not interfere with the normal projection of thebolt-head.

Another feature of the invention lies in the construction of the case aat the keyhole, by means of which the operation of inserting the key isrendered more easy and rapid.

It commonly occurs that the woodwork at the keyhole is cut outunnecessaril y by the carpenter,so that a shoulder is formed by thecase, the keyhole in said case being much smaller. This shoulder servesto frequently catch the key and prevent a rapid insertion into thelock-ease. In the present case the lock-case is provided. at the keyholewith inclined inwardly-projeeting guide-walls 32. (Shown in Figs. 5 and6'.) The hole is thus to a degree funnel-shaped, the outer part beinghuge and the inner part of the usual size to receive the key. By thismeans the shoulder or pro jection deemed objectionable is avoided.

Having thus described our invention, what we claim as new is 1.. Theimproved lock herein described in which is combined with the case, abolt head pivoted upon said case and adapted to turn into said case whenengaged by the strike plate or when operated by the electro-magnet, anelectro-magnet and its armature arranged in said lock case, saidarmature being connected to said pivoted bolt head to turn the same whenthe magnet is energized, substantially as set forth.

2. The improved lock herein described in which is combined with thecase, a bolt head. pivoted inside the case and projecting outwardtherefrom, an armature lever, linked to said pivoted bolt head to turnthe same inward when the magnet is energized, and an electromagnetarranged within the case, all said parts being arranged and operating,substantial] y as set forth.

3. The combination with the lock ease, of a pivotal bolt head,independent latches adapted each to operate said bolt head, and an. electro-lnagnet, its armature and connections also adapted to operate saidbolt head when said magnet is energized,substantially as set forth.

4. The combination with the lock case, latches having projections, 70,Z, and knob and key mechanisms for operating said latches, of a pivotalbolt head having an inclined side, i, a segmental side 17, and an arm,j, for engaging said projections of the latches for repressing ordrawing said bolt head back into the lock case, and a lock strike havinga roller bearing engaging the segmental side of the said lock strike,substantially as set forth.

5. The combination with the pivotal bolthead, in a lock, of anelectro-magnet, an armature-lever and a link pivoted upon said bolt-headand armature lever, substantially as and for the purposes set forth.

6. The electrically and mechanically operable lock, herein described inwhich is com-

